The building you mention is the Former Wills Tobacco warehouse, closed in the early 1990's, you won't see them on google because they were demolished by being blown up circa 1994, I stood on Bedminster Down to see it happen. The Ford Dealers now sits where they stood. To the left of them is the old Winterstoke road bus garage, which I based the model on my layout on, now long since demolished and replace with a KFC etc.
This thread certainly brings back memories, I used to pass by Ashton Meadows everyday on my way to School between 1982 and 1995 and can't believe how much has changed. For a while I worked for the container haulier which owned the yard near to the level crossing, and remember being disapointed to hear from one of our drivers who was also an enthuisast that the Signalbox was on fire (circa 2000) when he drove past.